KR100252703B1 - Method for making polyester yarn of different shrinkage - Google Patents

Abstract

PURPOSE: Provided is a manufacturing method of a polyester different shrinking blended yarn having increased producing speed, reduced production cost and high confounding quality. CONSTITUTION: The polyester different shrinking blended yarn is obtained by a process containing the steps of: spinning a core yarn(C) in the second spinneret(2); drawing the core yarn between the first godet roller(3a) and the second godet roller(4a); spinning an effective yarn(E) in the first spinneret(1); drawing the effect yarn(E) on the second godet roller(4a); blending the core yarn and the effective yarn in a confounding device(5); and then passing by the third godet roller(6a).

Description

Manufacturing method of polyester biaxial blended yarn

The present invention relates to a method for producing a polyester biaxially blended yarn in which polyester fibers having different shrinkages with respect to nonaqueous water in a spin draw spinner are mixed.

Conventionally, in order to manufacture a composite yarn, a yarn that is a material must first be manufactured through a separate process. In other words, the high and low shrinkage parts should be radiated separately and combined with separate apostles in the drawing machine, or the finished yarns must be plyed together using a separate ridge. The composite yarn manufactured in this way has a long manufacturing process, and the manufacturing cost is high at the time of production. As a result of dyeing of different kinds of yarns having different manufacturing processes, dyeing difference between the core yarn and the effect yarn occurs, resulting in defects of the fabric.

As described above, Japanese Patent Application Laid-Open No. 7-243144 discloses a spin thrower as an attempt to prevent process defects and fiber appearance defects, which are accompanied by various steps of the composite yarn, and to improve productivity and reduce manufacturing costs. A method of attaching a hot tube device to a core yarn and an effect yarn to vary the heat setting rate between the core yarn and the effect yarn has been proposed. However, this method has the disadvantage of attaching an expensive and difficult-to-handle facility such as a hot tube.

As a prior art for solving such a problem, Japanese Patent Laid-Open No. 63-235513 discloses a method for manufacturing a biaxially blended blend by combining two or more polyester fibers having different thermal shrinkage rates, wherein the core yarn and the effect yarn in a spin drawer After spinning through a separate spinneret, the core yarn is passed through the straight stretch, and the effect yarn is provided by the method of manufacturing a polyester bi-shrink blended yarn, characterized in that the plywood through the bypassed yarn. According to this method, entanglement is given before winding up after the cores and bypassed effect yarns are spliced up before or after the second gode controller, and the two materials with different thermal history and apostles become entangled by entanglement. Passing the second gode controller in the absence of the state, the material yarns are separated from each other by the tension difference on the rollers, causing mutual interference, resulting in process defects. This tendency is further exacerbated when heat is applied to the second gode controller, which results in the occurrence of a loop upon entanglement just before the winder. Therefore, it is necessary to pass entanglement before passing the second gode controller and pass the heating roller in order to have stable slope and quality. According to this method, the core yarn is stretched in this area, so imparting entanglement is impossible.

Therefore, an object of the present invention is to enable a polyester biaxially blended yarn having excellent entanglement quality in a simplified process without the problems of the prior art described above.

1 is a process diagram schematically showing an example of a method for producing a polyester biaxial blended yarn according to the present invention.

Figure 2 is a process diagram schematically showing another example of a method for producing a polyester biaxial blended yarn according to the present invention

Figure 3 is a process diagram schematically showing another example of a method for producing a polyester biaxial blended yarn according to the present invention

* Description of the symbols for the main parts of the drawings *

1: spinneret with effect 2: spinneret with core

3a: 1st go-detro controller 3b: 1st separator roller

4a: second gode controller 4b: second separator roller

6a: third gode controller 6b: third separator roller

5: first entanglement device 7: second entanglement device

According to the present invention to achieve the above object, in the method for producing a two-shrink blended yarn by combining two or more kinds of polyester fibers having different thermal contraction rate, the core yarn and the effect yarn in the spin drawer spinning machine through a separate spinneret After spinning, the core yarn passes through the straight apostle and the effect yarn passes through the bypassed apostle, but the core yarn stretches between the first godetrol and the second godetrol downstream.

Effect Inc. is provided a method for producing a polyester bi-shrink blended yarn comprising spinning with the core yarn by spinning at the speed of the second godetro controller without passing through the first gorodrol.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings that illustrate preferred embodiments thereof.

This manufacturing method adopts a method in which a polyester bishrink blended yarn is spun from an existing spin draw spinner, which is directly stretched, and an effect yarn that has been bypassed instead of being directly stretched by a spin drawn spinner do.

1 to 3, according to the method for manufacturing a polyester biaxially blended yarn according to the present invention, the core yarn C is spun from the second spinneret 2, so that the first gode controller 3a and the second The stretching is performed between the gode controllers 4a, and the effect yarn E passes through the second gode controller 4a by bypassing the first gode controller 3a. The core yarn (C) and the effect yarn (E), which have undergone such a slope, cross the third go-de controller (6a) after intermixing in the entanglement device (5). When adopting such a slope, the process stability on the 3rd high-detro controller 6a is good, and the tension is dropped by adjusting the speed between the 2nd high-detro roller 4a and the 3rd high-detro controller 6a, and entangled. By making it easy to obtain a useful effect, such as to increase the quality of the yarn can be obtained.

That is, according to the present manufacturing method, the core yarn is stretched by the speed difference between the first gode controller 3a and the second gode controller 4a downstream thereof, and then passes through the third gode controller 6a to take up the winding machine. It is wound up. At this time, the heat setting may or may not be performed in the third high controller 6a.

On the other hand, the effect yarn is bypassed by the first gode controller 3a and pulled from the second gode controller 4a, and then intermingled with the core yarn. Core's effects company can be carried out in one step or two steps. For this purpose, the entanglement device may be installed immediately before or after the third high controller, or both.

Preferably, the first entanglement device 5 is provided between the second gode controller 4a and the third gode controller 6a to entangle the effect yarn of the core yarn, or in this way, the third gode controller 6a. After passing through the second entanglement device (7) to secondary entanglement.

Figure 1 schematically shows one of the preferred embodiments of the production method. As shown in FIG. 1, the core yarn C is introduced into the second high detro controller 4a via the first high controller 3a and the first separator roller 3b. At this time, the core yarn is stretched by the speed difference between the first gode controller 3a and the second gode controller 4a, and passes through the first entanglement device 5 to undergo a third gode controller 6 of heating or non-heating. It is then wound up in the winder. At this time, the first separate roller 3b adopts a motor driving method. The reason for this is that in the case of the non-drive type, the stretching point is not fixed at the time of the stretching by the speed difference with the downstream roller, so that an unstretched portion occurs. Because.

Effect yarn (E) is introduced directly to the second gode controller (4a) by bypassing the first gode controller (3a) and then engraved with the core yarn in the first entanglement (5) and passes through the third gode controller (6a). After that, it is wound around the winding machine with or without passing through the second entanglement device (7).

2 illustrates another embodiment of the present invention. In the method illustrated in FIG. 2, the non-driven first separator roller 3b may be installed between the first high controller 3a and the second high controller 4a to give stretching without an undrawn portion. According to this private road, there is no need to use a motor-driven roller, thereby reducing the capital investment and operating costs.

According to the method of FIGS. 1 and 2, a first entanglement device 5 is provided between the second high controller 4 a and the third high controller 6 a to impart entanglement. In this case, the yarn quality of the composite yarn depends on the number of entangled yarns. Therefore, as many entanglements as possible can be provided. To this end, overfeed should be provided to reduce the tension. In this case, the left thread introduction part of the second gode controller is stretched, so the tension is very high, so the tension difference with the right side which is overfeed is severe, and the influence of the tension difference appears as slipping on the roller surface, resulting in incomplete stretching. There is a possibility. In addition, it is highly likely to be wound on the second high controller 4a when excessive overfeed is applied, so it may be appropriate to give a slight overfeed or rather underfeed to slightly pull depending on the process state. In this case, it is preferable to increase the entanglement quality by additionally installing the second entanglement device 7 before winding up, because imparting entanglement may be difficult due to tension increase.

3 illustrates another embodiment of the present invention. In the method illustrated in FIG. 3, the second separator roller 4b is attached to the second high controller 4a to be wound a certain number of times so that uniform stretching occurs without slipping. In this way, not only the stretching uniformity can be given but also sufficient overfeed can be provided between the second gode controller and the third gode controller, thereby increasing the number of entanglements without the need for a second entanglement device before the winding machine, thereby producing a high quality composite yarn. .

According to this method, since the winding speed is very fast, the number of interlocks is lower than that of a composite yarn manufactured by a general drawing machine or a separate plywood machine. In order to compensate for this, it is necessary in this method to raise the air pressure of the entanglement apparatus to the maximum within a range where no rain occurs. The air pressure of the entanglement device is 1.5 to 5.0 kgf / cm 2, more preferably 2.0 to 4.5 kgf / cm 2. At this time, the average number of interlocking 35 per 1m is appropriate. If the air pressure is weaker than the above range, the number of entanglements is less than 20 per 1m, and the systolic effect is insufficient.

In the present invention, it is preferable to use a material having a large single fiber fineness for maintaining the shape of the composite yarn and elasticity of the fabric. The fineness of the short fibers may vary depending on the application of the fabric to be applied, but about 2 to 10 denier, more preferably 2 to 8 denier are suitable. Too much short fiber fineness will result in poor drape of the overall fabric, and too little shortness of the fabric will cause the fabric to flicker and reduce resilience. In addition, the cross section of the yarn shows a good effect in both circular and deformed cross section, but in terms of maintaining the elasticity of the fabric, triangular cross section, circular hollow cross section, triangular hollow cross section, flat hollow cross section, flat cross section, etc. are more suitable than circular cross section.

In comparison, the effect yarn contributes to the touch expression and texture expression of the composite yarn, and the smaller the short fiber fineness, the better the pitch skin touch. Normal short fiber fineness of 0.3 ~ 6 denier, preferably 0.3 ~ 5 denier is good for the effect, and the shape of the fiber cross section is not largely affected, but the circular or triangular cross section is good for the effect, especially the triangular cross section has a gloss effect. Is good. In general, partially drawn yarns spun at a spinning speed of 2000-4000 m / min show a heat shrinkage of at least 30% and as high as 70%, which is -5% to 5% when the yarn is heated in the hoisting process during the weaving process. The heat shrinkage rate is reduced. Therefore, in the manufacturing process of the present invention, the second and third high-detro controllers and the winding speed are suitably 2000 to 5000 m / min, preferably 2500-4500 m / min. If it is lower than this speed range, the strength is low, the elongation is too high, and the fiber value is lost, and if it exceeds 5000 m / min, properties similar to those of the drawn yarn are expressed, and the effect of the partially drawn yarn cannot be obtained.

The speed of the first gode controller has a speed that the core yarn can be drawn yarn, the draw ratio is preferably 1.5 to 5.0 times, preferably 2.0 to 4.5 times. At this time, the thermal contraction rate of the stretched yarn is about 10-25%, and after the weaving process during the weaving process, the thermal contraction rate is about 5-20%.

In other words, the core yarn has a heat shrinkage rate of 5 to 20% after the call treatment, and the effect yarn has a heat shrinkage rate of -5 to 5% after the call treatment, but the difference in thermal shrinkage after the call treatment between the two companies is 5-20%. It is desirable to.

Features and other advantages of the present invention as described above will become more apparent from the embodiments described below. The following examples are intended to illustrate the present invention, it should be understood that the present invention is not limited thereto.

Example 1

A biaxial hornsum yarn was prepared using the apparatus of FIG. 2. In this case, the core yarn used yarn made of single-density 3 denier using a 24-hole detention, and the effect yarn used a yarn made of 0.7 denier with a single fineness of 96 holes. The speed of the first gode controller was 1200 m / min, the speed of the second go de controller was 4300 m / min, the speed of the third go de controller was 4320 m / min, and the air pressure of the interlock device was 3.0 kgf / cm 2. The results of the radiation, the number of occlusion and the degree of biaxial contraction are shown in Table 1.

Example 2

A biaxial hornsum yarn was produced using the apparatus of FIG. 3. In this case, the core yarn used yarn made of single-density 3 denier using a 24-hole detention, and the effect yarn used a yarn made of 0.7 denier with a single fineness of 96 holes. The speed of the first gode controller was 1200 m / min, the speed of the second go de controller was 4340 m / min, the speed of the third go de controller was 4300 m / min, and the air pressure of the interlock device was 3.0 kgf / cm 2. The results of the radiation, the number of occlusion and the degree of biaxial contraction are shown in Table 1.

Example 3

Core yarn used yarn made of 6 denier single fineness using 12-hole detention, and effect yarn was used in the same manner as in Example 1 except that yarn made of single-denier 1 denier using 72-hole detention was used. Shrinkage blend fibers were prepared.

Example 4

A biaxial horn fiber was produced in the same manner as in Example 2 except that the speed of the first gode controller was 1500 m / min and the speed of the second gode controller was 4500 m / min.

Example 5

The core yarn was a yarn made of 6 denier with single fineness using a 12-hole hollow hole, and the effect yarn was used in the same manner as in Example 1 except that the yarn was made with a single fineness of 1 denier using 72 holes of detention. A bi-shrink blended yarn was produced.

Example 6

A biaxial horn fiber was prepared in the same manner as in Example 1 except that the interlaced air pressure was 4.0 kgf / cm 2.

Example 7

Core yarn used yarn made of 1 denier with a single fineness using 72 holes of detention, and Effect yarn was used in the same manner as in Example 1 except that yarn made of 1.5 denier with a single fineness of 48 holes was used. Shrinkage blend fibers were prepared.

Comparative Example 1

Core yarn used yarn made with 6-denier fineness using 12-hole detention, and Effect yarn used yarn made with 1-denier with single precision using 72-hole detention. min, and the biaxial shrink fiber was prepared in the same manner as in Example 1 except that the speed of the second gode controller was changed to 5300 m / min and the speed of the third gode controller was 5320 m / min.

Comparative Example 2

A biaxial horn fiber was produced in the same manner as in Example 1 except that the air pressure of the entanglement device was 5.0 kgf / cm 2.

division Fair Fairness Heat Shrinkage Difference ^* (%) Number of intersections (pcs / m) Mou Fabric Resilience ^** 2nd gode controller winding degree Example 1 Good 20 32 radish ○ radish Example 2 Good 18 36 radish ○ radish Example 3 Good 24 30 radish ○ radish Example 4 Good 19 33 radish ○ radish Example 5 Good 17 28 radish ◎ radish Example 6 Good 18 38 radish ○ radish Example 7 Good 22 33 radish ○ radish Comparative Example 1 Good 10 20 Occur ○ Occur Comparative Example 2 Bad 20 44 bunch Unwind bunch

* The difference in thermal contraction rate is that of the effect yarn after the thermal treatment

It shows the value of minus heat shrinkage.

** Fabric Resilience: ◎. Very good. Good,? usually)

As can be seen from Table 1, according to the present invention, a polyester biaxially blended yarn having excellent entanglement quality is manufactured at an improved production speed and low cost by a simplified manufacturing process in which the drawing and spinning are performed directly while spinning in a spin drawer. It becomes possible.

Claims (10)

In the method of manufacturing two-shrink blended yarn by combining two or more kinds of polyester fibers having different thermal contraction rate, after spinning the core yarn and the effect yarn through separate spinnerets in the spin drawer, the core yarn goes through the straight yarn and the effect The company passes through the bypassed apostle and fires, but the core company extends between the first and second downstream controllers, and the effect company radiates the core by spinning at the speed of the second one and without going through the first one. A method for producing a polyester biaxially blended yarn comprising intertwining with a yarn. The method for producing a polyester biaxially blended yarn according to claim 1, wherein the core yarn is made to pass through a motor-driven or non-driven first separator roller provided above or below the first high controller. The method for producing a polyester biaxial blended yarn according to claim 1, wherein the core yarn and the effect yarn are made to pass through a motor driven or non-driven second separator roller provided above or below the second gode controller. The method of claim 1, wherein the winding speed of the spliced composite yarn is 2000 to 5000 m / min. The method of claim 1, wherein the entanglement is carried out using an entanglement device which is installed immediately before or after the third gode controller, or both. The method of claim 1, wherein the entanglement is performed at an air pressure of 1.5 to 5.0 kgf / cm 2 of the entanglement apparatus, and the number of entanglements is 25 to 45 per m. The method according to claim 1, wherein the core yarn to the heat shrinkage rate after the call treatment to 5 ~ 20%, the effect yarn to the heat shrinkage rate after the call treatment is -5 ~ 5%, the difference between the heat shrinkage rate after the call treatment between the two companies 5 Method for producing a polyester biaxial blended fiber, characterized in that to be ~ 20% The method of claim 1, wherein the single fiber fineness of the core yarn is 2 to 10 denier and the short fiber fineness of the effect yarn is 0.3 to 6 denier. The method for producing a polyester biaxial blended yarn according to claim 1, wherein the core yarn has a circular, hollow, triangular, Y, flat cross section. A polyester biaxially blended yarn and a fabric thereof prepared by the method according to any one of claims 1 to 10.